Specifies a command to call whenever the user browses on a directory
(usually by single-clicking on the name of the directory). The command
is called with one argument, the complete pathname of the directory.

Specifies the command to be called when the user activates on a directory
(usually by double-clicking on the name of the directory). The command
is called with one argument, the complete pathname of the directory.

Specifies the TCL command to be called when a directory listing is
needed for a particular directory. If this option is not specified, by
default the DirList widget will attempt to read the directory as a
Unix directory. On special occasions, the application programmer may
want to supply a special method for reading directories: for example,
when he needs to list remote directories. In this case, the
-dircmd option can be used. The specified command accepts two
arguments: the first is the name of the directory to be listed; the
second is a Boolean value indicating whether hidden sub-directories
should be listed. This command returns a list of names of the
sub-directories of this directory. For example:

Specifies whether hidden directories should be shown. By default, a
directory name starting with a period "." is considered as a hidden
directory. This rule can be overridden by supplying an alternative
-dircmd option.

The tixDirList command creates a new window (given by the
pathName argument) and makes it into a DirList widget.
Additional options, described above, may be specified on the command
line or in the option database to configure aspects of the
DirList such as its cursor and relief.
The DirList widget displays a list view of a directory, its
previous directories and its sub-directories. The user can choose one
of the directories displayed in the list or change to another
directory.

The tixDirList command creates a new Tcl command whose name is
the same as the path name of the DirList's window. This
command may be used to invoke various operations on the widget. It has
the following general form:

pathName option ?arg arg ...?

PathName is the name of the command, which is the same as the
DirList widget's path name. Option and the args
determine the exact behavior of the command. The following commands
are possible for DirList widgets:

Query or modify the configuration options of the widget. If no
option is specified, returns a list describing all of the
available options for pathName (see Tk_ConfigureInfo for
information on the format of this list). If option is specified
with no value, then the command returns a list describing the
one named option (this list will be identical to the corresponding
sublist of the value returned if no option is specified). If
one or more option-value pairs are specified, then the command
modifies the given widget option(s) to have the given value(s); in
this case the command returns an empty string. Option may have
any of the values accepted by the tixDirList command.

When no options are given, this command returns the pathname of the
subwidget of the specified name.
When options are given, the widget command of the specified subwidget
will be called with these options.